1. Implement a new static method for the IntNode class with one parameter that is a head reference for a linked list. The return value of the method is a boolean value that is true if the list contains at least one copy of 42; otherwise, it is false.
2. Implement a new static method for the IntNode class with one parameter that is a head reference for a linked list. The return value of the method is the sum of all the numbers on the list.
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